Random implementation detail, but I’d like to make a library for transpiling regexes from Elixir → js and Elixir → Postgresql at some point, that would be a subset (a growing subset over time) of Elixir’s regex capabilities. Might be useful when you get to =~ operators etc.
zachdaniel
Creator of Ash
6
bartblast
Creator of Hologram
I can confirm that all of these use cases will be supported through either the planned subscription DSL or by sending messages directly to specific component actions via component ID, session ID, or connection ID.
1
bartblast
Creator of Hologram
bartblast
Creator of Hologram
Thank you! 
I can see the appeal of extracting parts of Hologram into separate libraries, but I don’t think it’s the right time. The scope of Hologram is massive - it’s essentially Phoenix + LiveView + Surface + ElixirScript all rolled into one. Right now, I can focus on code that’s specifically tailored to support the framework’s goals, which allows me to move much faster.
Extracting libraries at this stage would significantly slow down development and potentially create architectural constraints, plus add additional overhead from managing the maintenance of such libraries. I’d rather get the core framework solid first, then consider what pieces might make sense as standalone libraries.
That said, I appreciate the suggestion and it’s definitely something I’ll keep in mind for the future!
6
bartblast
Creator of Hologram
The key insight was that every microsecond matters when you’re building a framework that needs to handle real-time interactions, render at least 60 FPS, and work with transpiled code using boxed types. I systematically profiled and optimized each layer - from the lowest-level bitstring operations up through the highest-level user interactions.
For profiling and benchmarking, I used a multi-tool approach:
- Benchee for comprehensive Elixir performance testing
- Custom JavaScript benchmarking scripts using process.hrtime() for precise timing
- Chrome DevTools Performance Profiler for detailed client-side analysis
The JavaScript JIT compilation made it even more tricky, because you’ll see much different results for cold vs warm vs hot code. For the Elixir part, I was mainly optimizing the compiler, so the tricky part was balancing different project conditions - e.g., different characteristics depending on the call graph structure, module complexity, and compilation patterns.
It’s been quite a journey! The performance improvements were the result of countless hours of profiling, benchmarking, and iterative optimization. It was a very repetitive process, but strangely satisfying when you managed to squeeze out performance gains here and there 
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Lucassifoni
Hello and congratulations for this release ! I did not have the time yet to actually use Hologram, but I’m fully positive about your direction and vision.
Do you see anything that would block hot-loading Hologram modules at runtime in prod ?
From the docs, I don’t see things that would prevent that.
I see that the generated JS goes to priv/static/hologram, but this can happen at runtime too.
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Eiji
I’m not sure if I can recommend Hologram for prod. It’s definitely an amazing project with a brilliant future, but comparing to other solutions it lacks too many features and you would end up with a project that you can’t fix unless you wait for a next release. I would suggest to study docs and if you think that your project would need at least one missing feature then don’t rush into it too soon.
That’s said I fully recommend learning it and working on pet projects. I believe that it may become a really popular solution in future, but it needs more feature-complete release. Make sure you double check Roadmap before you decide to rush with it into prod as frustration here would be a huge loss for a project with such a promising future …
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Lucassifoni
Thanks for your consideration. I would use it in a production setting, but for non-user-facing things (well, I would be the user), that I could easily port to Liveview if my interests diverged from Hologram’s.
3
itzmidinesh
bartblast
Creator of Hologram
A user reported that the installation instructions were outdated after v0.5.0 removed redundant endpoint integration (which was simplified). If you’re getting errors during setup, just remove the use Hologram.Endpoint and hologram_socket/0 lines from your endpoint module and you should be good to go.
https://github.com/bartblast/hologram/issues/223
The Installation Guide on the website has been updated now. Thanks @bunnylushington for catching this!
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